Buggy code:
@ Singleton public class PlotMeCoreManager { private static final PlotMeCoreManager INSTANCE = new PlotMeCoreManager ( ) ; private final HashMap < String , PlotMapInfo > plotmaps ; private PlotMe_Core plugin ; private HashSet < UUID > playersignoringwelimit ; private PlotMeCoreManager ( ) { } public static PlotMeCoreManager getInstance ( ) { } void setPlugin ( PlotMe_Core instance ) { } public int getIdX ( String id ) { } public int getIdZ ( String id ) { } public Plot getPlotById ( String id , PlotMapInfo pmi ) { } public Plot getPlotById ( IPlayer player , PlotMapInfo pmi ) { } public void removePlot ( PlotMapInfo pmi , String id ) { } public void setOwnerSign ( IWorld world , Plot plot ) { } public boolean isPlotAvailable ( String id , PlotMapInfo pmi ) { } public String getPlotId ( ILocation location ) { } public String getPlotId ( IPlayer player ) { } public ILocation getPlotBottomLoc ( IWorld world , String id ) { } public ILocation getPlotTopLoc ( IWorld world , String id ) { } public void removeOwnerSign ( IWorld world , String id ) { } public void removeSellSign ( IWorld world , String id ) { } public void removeAuctionSign ( IWorld world , String id ) { } public void setAuctionSign ( IWorld world , Plot plot ) { } public void setSellSign ( IWorld world , Plot plot ) { String line1 = Util ( ) . C ( "SignForSale" ) ; String line2 = Util ( ) . C ( "SignPrice" ) ; String line3 = String . valueOf ( plot . getCustomPrice ( ) ) ; <START_BUG> String line4 = "//plotme<seq2seq4repair_space>" + ( Util ( ) . C ( "CommandBuy" ) ) ; <END_BUG> getGenManager ( world ) . setSellerDisplay ( world , plot . getId ( ) , line1 , line2 , line3 , line4 ) ; } public boolean isValidId ( IWorld world , String id ) { } public int bottomX ( String id , IWorld world ) { } public int topX ( String id , IWorld world ) { } public int bottomZ ( String id , IWorld world ) { } public int topZ ( String id , IWorld world ) { } public ILocation getPlotHome ( IWorld world , String id ) { } public List < IPlayer > getPlayersInPlot ( IWorld world , String id ) { } public IPlotMe_GeneratorManager getGenManager ( IWorld world ) { } @ Deprecated public short getNbOwnedPlot ( UUID uuid , String name , String world ) { } public short getNbOwnedPlot ( UUID uuid , String world ) { } private boolean isEconomyEnabled ( String world ) { } public boolean isEconomyEnabled ( PlotMapInfo pmi ) { } public boolean isEconomyEnabled ( IWorld world ) { } public PlotMapInfo getMap ( IWorld world ) { } public PlotMapInfo getMap ( String world ) { } public PlotMapInfo getMap ( ILocation location ) { } public PlotMapInfo getMap ( IEntity player ) { } public Plot getPlotById ( String id , IWorld world ) { } public Plot getPlotById ( String id , String name ) { } public Plot getPlotById ( String id , IPlayer player ) { } public Plot getPlotById ( IPlayer player ) { } public void removePlot ( IWorld world , String id ) { } public void addPlot ( IWorld world , String id , Plot plot ) { } public void addPlot ( IWorld world , String id , Plot plot , PlotMapInfo pmi ) { } public IWorld getFirstWorld ( ) { } public boolean isPlotWorld ( IWorld world ) { } public boolean isPlotWorld ( ILocation location ) { } public boolean isPlotWorld ( IEntity entity ) { } public boolean isPlotWorld ( IBlock block ) { } public Plot createPlot ( IWorld world , String id , String owner , UUID uuid , PlotMapInfo pmi ) { } public boolean movePlot ( IWorld world , String idFrom , String idTo ) { } private void movePlotToEmpty ( IWorld world , Plot filledPlot , String idDestination ) { } public void removeLWC ( IWorld world , String id ) { } public void clear ( IWorld world , Plot plot , ICommandSender sender , ClearReason reason ) { } public boolean isPlotAvailable ( String id , IWorld world ) { } public boolean isPlotAvailable ( String id , IPlayer player ) { } private boolean isPlotAvailable ( String id , String world ) { } @ Deprecated public IPlotMe_GeneratorManager getGenMan ( String name ) { } public void adjustWall ( IPlayer player ) { } public void adjustWall ( IWorld world , String id , boolean claimed ) { } public void setBiome ( IWorld world , String id , IBiome biome ) { } public HashSet < UUID > getPlayersIgnoringWELimit ( ) { } public void setPlayersIgnoringWELimit ( HashSet < UUID > playersignoringwelimit ) { } public void addPlayerIgnoringWELimit ( UUID uuid ) { } public void removePlayerIgnoringWELimit ( UUID uuid ) { } @ Deprecated public boolean isPlayerIgnoringWELimit ( UUID uuid ) { } public HashMap < String , PlotMapInfo > getPlotMaps ( ) { } public void addPlotMap ( String world , PlotMapInfo map ) { } public void removePlotMap ( String world ) { } private Util Util ( ) { } public boolean isPlayerIgnoringWELimit ( IPlayer player ) { } public ILocation getPlotMiddle ( IWorld world , String id ) { } public void UpdatePlayerNameFromId ( final UUID uuid , final String name ) { } public String getPlotProperty ( String id , String world , String pluginname , String property ) { } public String getPlotProperty ( Plot plot , String pluginname , String property ) { } public boolean setPlotProperty ( String id , String world , String pluginname , String property , String value ) { }

Fix:
String line4 = "//plotme<seq2seq4repair_space>buy" ;